Improvement in machinery for corrugating and moulding sheet-metal



dimmi tang @stent Gamm ASA JOHNSON, OF BROOKLYN, NEW YORK, ASSIGNOR TO HIMSELF AND WILLIAM HfJOHNSON, OF NEW YORK CITY.

Letters Patent No. 99,684, dated February 8, 1870.

IMPROVEMENT IN MACHINERY FOR CORR'UG-ATING- lNI) MOULDING SHEET-METAL. I *A-*W* The Schedule referred to in these Letters Patent and making part of the samev 1'0 all whom it may concern:

the county of Kings, and State of New York, have 4invented certain new and useful Improvements in Machines for Rolling Sheet-Metal, and do hereby dcclarcgthat the following is a full, clear, and exact description thereof, reference heilig had to the accompanying drawings .and to the letters of reference marked thereon.

lhc nature of my invention consists in the construction ofthe rollers ill a machine for rollingor corrugating,r sheet-metals, as will be hereinafter fully set forth.

ln order to enable others skilled in the artto which my invention appertans to make and use the same, l will now proceed to describeits construction and operation, referring to the annexed drawings, which form a part of this specification, and in which- `Figure l is a' front elevation of my machine;

Figure 2 is a transverse vertical section of the two rollers; and

Figure 3 is a similar section of the rollers, showingV a different mode. of constructing the same.

A represents `the bed-plate, upon which are placed two stainlards B B, a suitable distance apart. 1n suit-able journaleboxes', within the standards B B, the rollers O (i are placed, one above the other and the upperrollers pressed down upon the lower, byl

means of thc screws l) D bearing upon the upper journal boxes, which are allowed to slide up and down in grooves made for that Ypurpose in the standards.

ln front ofthe rollers O O is a feed-table, E, which is moved inward to the rollers at the desired instant, by any suitable devices, and carried outward again by means of the weights GiV G.

The two rollers O O are connected by means of gear.

wheels H Il, placed outside ot' onev of the standards on one of their journals, so that, motion being comnnmica-ted lo either one of said rollers, both of them will revolve in the proper direction. Y i

lhe rollers C C are provided on their outer surface with two or more kinds of teeth or projections, the rollers being made either entirely solid, or hollow with a 'solid' rim, npon which the teeth or projections are ibi-mcd.

These teeth or projections are formed in the following manner The rollers are grooved lengthwise on a circle, equal to a circle struck from the centre of the roller, to or around the roller, at one-half the depth of the teeth or moulding toghe formed. After the lcompass has been set, same as to form the above circle, I put one of its points at one point or end of the tooth, projection, or moulding to be formed, and the other point of compass far enough from the centre of the roller, so that when the first point, which isat the end of the tooth' 01 moulding, is swung around, it will strike cX- actly at the other end of the tooth-segment, projection, or moulding to be formed, making all the profile lines on the same curve as the pitch-line of the roller.

By this mode of forming the teeth or projections, the rollers will rnn smoothly together, bearing as equally at all points as round rollers of the same size. They will not bind, and may be run one way as well asthe other. j

By havingr different kinds and shaped mouldings on the same rollers, I only have to groove as much surface for each kind of moulding as is required for that particular kind, which is the width of one sheet ot' metal.

Gear-wheels, of any kind, may have their teeth formed according to the same rules as abo-ve described for the rollers, which will cause them to run smoothly and not bind, this rule being. the only perfect one by which such teeth or projections can be formed. The further they are from the pitch-line, in just such proportion they are imperfect, and will not run smoothly, but bind more or less.

Having thus fully described my invention,

I claim, as my improvement in machines for corrngating and moulding sheet-metal, constructing the surface of each roll of two or more sections, or series of longitudinal -ribs or projections, and corresponding sections or series of grooves or depressions, in order to produce by the same rolls, on two or more plates, two or more different styles of corrugations or mouldings, substantially 4as herein set forth.

ASA JOHNSON.

Witnesses:

' I. H. SMITH,

THOMAS Frenzen.. 

